<template>
    <div class="cmt-container">
        <h3>发表评论</h3>
        <hr>
        <textarea placeholder="请输入你要bb的内容（120字以内）" maxlength="120" v-model="msg"></textarea>
        <mt-button type="primary" size="large" @click="postComment">发表评论</mt-button>

        <div class="cmt-list">
            <div class="cmt-item" v-for="(item, i) in comments" :key="item.add_time">
                <div class="cmt-title">
                    第{{i+1}}楼&nbsp;&nbsp;用户：{{item.user_name}}&nbsp;&nbsp;发表时间：{{item.add_time | dateFormat}}
                </div>
                <div class="cmt-body">
                    {{item.content === 'undefined'? '此用户很懒，未作出评论': item.content}}
                </div>
            </div>
        </div>

        <mt-button type="danger" size="large" plain @click="getMore">加载更多</mt-button>
    </div>
</template>

<script>
    import { Toast } from 'mint-ui'
    export default {
        data() {
            return {
                pageIndex: 1,
                comments: [],
                msg: ''
            }
        },
        created(){
          this.getComments();
        },
        methods: {
            getComments() {
                this.$http
                    .get('api/getcomments/'+this.id+'?pageindex='+this.pageIndex+'')
                    .then(result => {
                        if (result.body.status === 0){
                            this.comments = this.comments.concat(result.body.message)
                        } else {
                            Toast('获取评论失败。。。')
                        }
                    })
            },
            getMore() {
                this.pageIndex++;
                this.getComments()
            },
            postComment() {
                if (this.msg.trim().length === 0){
                    return Toast('评论内容为空！')
                }
                this.$http.post('api/postcomment/'+ this.$route.params.id, {
                    content: this.msg.trim()
                }).then(function (result) {
                    if (result.body.status === 0){
                        var cmt = {
                            user_name: 'ZXC',
                            add_time: Date.now(),
                            content: this.msg.trim()
                        };
                        this.comments.unshift(cmt)
                        this.msg = ''
                    }
                })
            }
        },
        props: ['id']
    }
</script>

<style lang="scss" scoped>
    .cmt-container {
        h3 {
            font-size: 18px;
        }
        textarea {
            font-size: 14px;
            height: 85px;
            margin: 0;
        }
        .cmt-list {
            margin: 5px 0;
            .cmt-item {
                font-size: 13px;
                .cmt-title {
                    background-color: #ccc;
                    line-height: 30px;
                }
                .cmt-body {
                    line-height: 35px;
                    text-indent: 2em;
                }
            }
        }
    }
</style>